You can get the weight tracker by clicking on mine in my siggy, it will take you to the website to create one, but you have to have a certain amount of posts before you can put it in your siggy here, so get posting!
Welcome to the site. It's a great place and really encouraging.
Have you thought you might have put on a little water weight from the walking? Lots of people report a gain when they first start exercising due to water retention. Try drinking more water and eating less salt and see what happens.
Keep up the good work.